期刊论文

Performance analysis of Venezuela rock asphalt and its modified asphalt

中文

交通科学与工程

1674-599X

2020

36

1

1-6

10.16544/j.cnki.cn43-1494/u.2020.01.001

51878077:国家自然科学基金 201720:安徽省交通运输科技进步计划项目 FS-XTNH-G-(2018)011:佛山市建盈发展有限公司科技项目

本校为第一机构

为了研究委内瑞拉岩沥青的原材料性质及其改性效果,通过室内委内瑞拉岩沥青及其改性沥青的物化性能试验,分析了其原材料的物理性质、沥青含量（质量比例）、沥青四组分及矿物质成分,评价了不同掺量委内瑞拉岩沥青对其改性沥青性能的影响规律,并揭示了其改性机理。研究结果表明:委内瑞拉岩沥青中沥青的含量高达95%以上,且沥青质和胶质的含量超过了80%,是一种高聚合度的硬质沥青,其中的矿物质主要含有Si O2,Ca SO4和CaS及少量CaCO3;委内瑞拉岩沥青用作改性剂时,能显著提高改性沥青的黏度和抗变形能力,改善高温、抗老化、抗水损及感温等路用性能,但对低温性能有不利影响,故宜控制委内瑞拉岩沥青掺量...

In order to research the raw material properties and modification effects of Venezuela rock asphalt,the physicochemical properties of Venezuela rock asphalt and its modified asphalt were tested in laboratory.The physical properties,asphalt content(mass proportion),asphalt four-component and mineral composition were analyzed for its raw materials.The influence rules were evaluated for different mixing amounts of Venezuela rock asphalt on the performances of its modified asphalt,and the modification mechanism was revealed.The results show that the asphalt content in Venezuela rock asphalt is at ...